I believe that the US military asked for the 30,000 troop increase in order to put the Taliban back on their heels, driving them out of areas they had always dominated and making it possible to turn the policing job over to the government without the Taliban in control.

That didn't work as the majority of government troops cannot even read or write, and do not have the will nor inclination to oppose the Taliban. I suspect they just wanted as much US money as they could get.

I looks now like it is time to go, to leave Afghanistan to the Fundamenalist Muslims; I expect Obama will announce a more rapid withdrawal any day now.